1. Evolution & Adaptation
David Mense
Lead Science Teacher
Lee County Schools

2. Who’s This Guy?

4. Evolution by Natural Selection

5. Why did they even go to The Galapagos Islands?

6. Who is This?

9. Common?

10. Common?

11. Common?

12. Evolutionary Similarities
Homologous
Share a common ancestor – similar structure but not function.
Analogous
Share a common function but not a common ancestor
Selection Pressure compared to common ancestor

13. Homologous or Analogous
Wing of a Bat – Wing of a Moth
Forearm of a Human – Wing of a Bird
Forearm of a Frog – Flipper of a Whale
Bill of Platypus – Bill of a Duck
Forearm of a Human – Foreleg of a Cat
Forearm of a Human – Wing of a Bat

14. Vestigial Structures
Genetically determined structures or attributes that have lost some or all of their function, but have been retained due to the process of evolution.

16. Vestigial Structures - Animals

18. Hyoid Bone